问题描述

springmvc sessionFactory is null

严重: Servlet.service() for servlet [spring2] in context with path [/Lbl] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
java.lang.NullPointerException

说明：@resource和@annotional都不起作用。
网上的方法都试过了，不起作用
spring2-servlet.xml

<?xml version=""1.0"" encoding=""UTF-8"" ?>
xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance""
xmlns:p=""http://www.springframework.org/schema/p""
xmlns:context=""http://www.springframework.org/schema/context""
xmlns:mvc=""http://www.springframework.org/schema/mvc""
xmlns:oxm=""http://www.springframework.org/schema/oxm""
xsi:schemaLocation=""http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/oxm
http://www.springframework.org/schema/oxm/spring-oxm-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"">

<context:component-scan base-package=""com.lbl.active"" /><bean class=""org.springframework.web.servlet.view.BeanNameViewResolver""/><bean id=""bookXmlView"" class=""org.springframework.web.servlet.view.xml.MarshallingView"">    <constructor-arg>        <bean class=""org.springframework.oxm.xstream.XStreamMarshaller"">            <property name=""autodetectAnnotations"" value=""true""/>        </bean>    </constructor-arg></bean><bean id=""jsonView"" class=""org.springframework.web.servlet.view.json.MappingJacksonJsonView""></bean>

application.xml

context:annotation-config/
<!-- 自动扫描与装配 -->
/context:component-scan

<!-- 导入外部的properties--> <context:property-placeholder location=""classpath:jdbc.properties""/> <!--配置session工厂 --><bean id=""sessionFactory"" class=""org.springframework.orm.hibernate3.LocalSessionFactoryBean""><!-- 配置数据库路径 classpath:WEB-INFclasseshibernate.cfg.xml-->    <property name=""configLocation"" value=""classpath:hibernate.cfg.xml""></property>     <!-- 配置数据库c3p0连接池  dataSource写错导致bean创建异常错误信息属性值设置错误 -->    <property name=""dataSource"" >  <!-- dataSouce应该写成dataSource第三个错误 -->    <bean class=""com.mchange.v2.c3p0.ComboPooledDataSource"">      <!-- 配置数据库信息 -->   <property name=""jdbcUrl"" value=""${jdbcUrl}""></property>   <property name=""driverClass"" value=""${driverClass}""></property>   <property name=""user"" value=""${user}""></property>   <property name=""password"" value=""${password}""></property>    <!-- 其他配置 -->    </bean></property></bean>  <!-- 配置声明事物管理  采用注解方式--> <bean id=""txManager"" class=""org.springframework.orm.hibernate3.HibernateTransactionManager"" >    <property name=""sessionFactory"" ref=""sessionFactory""></property> </bean>   <tx:annotation-driven transaction-manager=""txManager""/>

web.xml

<?xml version=""1.0"" encoding=""UTF-8""?>
xmlns=""http://java.sun.com/xml/ns/javaee""
xsi:schemaLocation=""http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"" version=""3.0"">
Lbl

index.jsp

contextConfigLocation

/WEB-INF/applicationContext.xml

org.springframework.web.context.ContextLoaderListener

encodingFilter
org.springframework.web.filter.CharacterEncodingFilter

encoding
UTF-8

encodingFilter
*.do

   <filter>   <filter-name>openSession</filter-name>  <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> <init-param>     <param-name>sessionFactoryBeanName</param-name>     <param-value>sessionFactory</param-value> </init-param>  </filter>  <filter-mapping>  <filter-name>openSession</filter-name>  <url-pattern>/*</url-pattern>  </filter-mapping>

spring2
org.springframework.web.servlet.DispatcherServlet
1

spring2
/

出错的类

@Transactional
public class DaoService implements DaoLbl{

@Resource
private SessionFactory sessionFactory;
private Class clazz;

@SuppressWarnings(""unchecked"")
public DaoService(){
System.out.println(""---1---->>>:""+this.getClass());
// System.out.println(""----2--->>>:""+this.getClass().getGenericSuperclass());
//使用反射技术获得 T的真实类型
ParameterizedType pt=(ParameterizedType)this.getClass()//
.getGenericSuperclass();//获取当前new的泛型父类类型
System.out.println(""------->:"");
this.clazz=(Class)pt.getActualTypeArguments()[0];
//获取第一个参数的实际类型
System.out.println(""class--->"" + clazz);
}

 protected Session getSession(){

//

// String path=""C:/Users/admin/workspace/Lbl/WebContent/WEB-INF/applicationContext.xml"";
// ApplicationContext ac=new FileSystemXmlApplicationContext(path);
// SessionFactory sessionFactory=(SessionFactory)ac.getBean(""sessionFactory"");
// System.out.println(""00001113333333----000->""+ sessionFactory);
// System.out.println(""00001113333333----000->""+ sessionFactory.openSession());

// return sessionFactory.openSession();
// System.out.println(""0000000->""+ sessionFactory.getCurrentSession());
try {
return sessionFactory.getCurrentSession();
} catch (Exception e) {
e.getStackTrace();
}
return null;

    }

}

解决方案

@Transactional
@Service-------少了这个吧
public class DaoService implements DaoLbl

解决方案二：
不行呀，DaoService类的jdk事物代理机制不起作用

解决方案三：
谁能帮我调试一下代码

解决方案四：
qq1339665152

解决方案五：
http://blog.csdn.net/evankaka/article/details/45790533